Expansion joint



March 30 192% G. F. MURPHY EXPANSIO-N' JOINT Filed Dec. 23, 1925 WSwot/wags reamed Mar. so, 1926.

I of my application,

November 1, 1924.

imam

it a h GEORGE F. MURPHY, OF PHILADELPHIA, PENNSYLVANIA.

EXPANSION JOINT.

Application filed December 2t, 1925; Serial No. 77,255.

To all whom it may concern. V Be it known that I, Gnoncn F. MURPHY, aCitizen of the United States, residing 'at Philadelphia, in the countyofPhiladelphia and State of Pennsylvania, have made an Invention inExpansion Joints, of which the following is a specification.

This application is in part a continuation Serial No. 747,715, filed Theinvention relates to expansion joints and has for one of its primaryobjects the provision of an improved joint of the guided type, theconstruction of which compact and inexpensive. Expansion joints of theguided type have heretofore been em-' ployed butthese are of expensiveand rather a cumbersome construction, in consequence of which, theirfield of use is somewhat limited.

By my invention I. propose to extend the field within which guidedjoints may be used and provide a joint which may be effectivelysubstituted for such more expensive joints ed while the line is in manyplaces.

I also propose a'joint which may be packhot and expanded and the jointcontracted.

Fig. 2 is an end elevation of the ,jointo f Fig. 1; and

Fig. 3 'is a sectiontaken on the line -33 of Fig. 1.

Referringmow to Fig. 1, the joint coinprises a casing A, which isflanged'at one end at 7 for connectioninto the pipe line, and flanged atthe other end at 8 for the purpose of adjustablysecuring a combinedstuffing box gland and guide, as'will further appear. If desired thecasing maybe reinforced by a plurality of longitudinal ribs 9.

Telescopic within'the casing'A is a tubular member or pipe section Badapted .to be connected to the pipe line by means of the collar 10.

The casing is so constructed on its interior as to cooperate with thepipe section to form a stufing section guide is simple,

-each of which is adapted to approximateliy 98 box joint, packed withsuitable 11, whichpacking: is adapted to be the combined gland and pipe12. It will. be observed that this cbmbined gland and guide is ofsubstantial length, providing a bearing for the pipe section for aconsiderable portion of its length. In the embodiment shown the glandpresents a bearingfor the pipe to a point well removed from the base ofthe packing packing compressed by chamber and from the packing end ofthe gland and well beyond the flange 8 of the cas1ng. I

Intermediate its ends the gland is provided with aplurality of'spacedradial. lugs 13 apertured for the reception of the bolts 14 which areutilized to draw up the gland to compress the packing as may berequired.

The casing has a plurality of peripherally spaced arms or fingers 15projecting from its right hand end, such arms acting as a support forthe free end of the gland preventing distortion and displacement. Thelugs 13 lie in the spaces between arms.

The gland has its inner face out out intermediate theends, leaving abearing surface at each end with an intermediate cavity which can befilled with grease or other lubricant by removing the plug 16.

At the inner endof the pipe B, a collar 17 is secured, preferably bythreading. This collar slides within the casing and is provided with aplurality of diagonal ribs 18,

overlap the surface traversed by the a jacent ribs in order to preventthe wearing of grooves and relieve. compression to cut downthe-expansion by reduction of the mass of metal of the guide collar. Thespaces between ribs also provide for self-cleansing.

The constructionis simple, compact and sturdy and the parts can bereadily assembled. The collar 17 acts to limit the move-' ment. Thetubular member B hasits free end extended to such a point that the coupling collar 10 is spaced far enough from the fingers 15 to permit of thecombined gland and guide -being slipped clear of the fingers to providea free and unobstructed annularv space to permit of the joint beingpacked with the line hot and expanded and the joint contracted, withoutotherwise disturbing the joint, which is of great practical .value andadvantage. 4

The spaces between fingers permit of air cooling of the gland which inturn improves lubricating conditionsv and reduces expansion of the glandand guide whereby a close fit is maintained than would otherwise be thecase.

I claim: 7

1. An expansion joint comprising a casing a pipe telescopic in thecasing, a stuttingbox joint and gland therefor, said gland having meansintermediate its ends for adjustable attachment to the casing and havingits free end bearing on the pipe well beyond said means, and a supportfor the free end of the gland.

2. An expansion joint comprising a casing. having a plurality of spacedfingers extending from an end thereof, a pipe telescopic in the casing.and a stutiing box joint? and gland therefor, said gland having aplurality ot 'spaced attaching members adapted to lie in the spacesbetween lingers, said lingers supporting the free end of the g unl ing'.a pipe 6' ing box joint tin. gland for the joi;

joint comprising a casir In the ca ing. 21 stutl'- fmixveen. andcombined and guide for th pipe together with 1:; for adjusting the glandwith resp ct to (':!:-li1{ 1' and means for supporting the guide end ofthe gland from "the casing.

4. In oinbination in an expansion joint. 'a casino. a pipe tel scopictherein. a parked joint thercbetn'een. and a rylindrical packing glandtor the j-=int. the gland having a portion extending to a point from thebase of the packing chamber and Well removed having a relatively closefit on the pipe, and the casing having a portion extending to a. pointwell removed from the base oi the packing chamber to externally supportand guide the gland for a substantial portion of its length; whereby thegland functions al--'o as uide for the pipe.

5. In combination in an expansion joint. a casing, a pipe telescopictherein. a packed joint therebetween, and a cylindrical pat-l;- inggland for the joint, tl gland having a portion extending to a point rcelremoved from the base of the packing chamber and having a relativelyclose lit on the pipe, and the casing having a portion extending to apoint Well removed from the base of tiltpaclzing chamber to externallysupport and guide the gland for a substantial portion of its length.whereby the gland 'i'unrtions also as a guide'tor the. pipe, togetherwith a piston guide tor the pipe \vorlring in the easmgr ension jointcomprising a casielescopie therein and a guide 1 comprising a non-inninghead, 1 cylimlriral surface tor guiding the head, he guide bead havingdiagonal ribs so aniil disposed that the surface over which c- {b movesis appr 'mately lapped by i-nt ribs on longiuulinal movement of 1 partsthus preventing the Wearing oi ores. 1 testimony whereof I signed byname.

have hereunto F. IiIURPl-IY.

